<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>037-优先级.html</title>
</head>
<body>
	
</body>
<script>
	var a ="aaa"+ 1 + 2 + "bbb";
	console.log(a);//aaa12bbb aaa3bbb

	console.log(1 || 0 && 2);//0 1
	console.log(!0 && null || undefined);//undefined

	console.log(!1 || 2 && 3);//3
	console.log(3 || !6 && 9 && 5);
	console.log((1 || 0 && 0) && 9);	

</script>
</html>